-8 plus 12e equals -20

Answer 1

-8 + 12e = -20

12e = -20 + 8 (Make both sides equal; to remove the -8 on the left we need to add 8, which adds 8 to the right-hand-side)

12e = -12 (Now divide by 12 to get e)

e = -12/12

e= -1